added (disabled) SDL renderer information code

src/common/FrameBufferSDL2.cxx

@@ -84,6 +84,46 @@ void FrameBufferSDL2::queryHardware(vector<GUI::Size>& displays,
     displays.emplace_back(display.w, display.h);
   }
 
+#if 0
+  struct RenderName
+  {
+    string sdlName;
+    string stellaName;
+  };
+  // create name map for all currently known SDL renderers
+  const int NUM_RENDERES = 5;
+  static const RenderName RENDERER_NAMES[NUM_RENDERES] =
+  {
+    {"direct3d",  "Direct3D"},
+    {"opengl",    "OpenGL"},
+    {"opengles",  "OpenGLES"},
+    {"opengles2", "OpenGLES2"},
+    {"software",  "Software"}
+  };
+
+  int numDrivers = SDL_GetNumRenderDrivers();
+  for(int i = 0; i < numDrivers; ++i)
+  {
+    SDL_RendererInfo info;
+    if(SDL_GetRenderDriverInfo(i, &info) == 0)
+    {
+      // map SDL names into nicer Stella names
+      bool found = false;
+      for(int j = 0; j < NUM_RENDERES; ++j)
+      {
+        if(RENDERER_NAMES[j].sdlName == info.name)
+        {
+          VarList::push_back(renderers, RENDERER_NAMES[j].stellaName, info.name);
+          found = true;
+          break;
+        }
+      }
+      if (!found)
+        VarList::push_back(renderers, info.name, info.name);
+    }
+  }
+#endif
+
   // For now, supported render types are hardcoded; eventually, SDL may
   // provide a method to query this
 #if defined(BSPF_WINDOWS)